Ankle sprains are the most common type of joint ligament injury in sports. It mostly occurs in sports such as running, basketball, soccer, high jump, long jump, skating, skiing, parachuting and wrestling. The main reason for this is that the muscles and ligaments of the ankle joint do not move well before exercise, and the elasticity and extension of the joint ligaments are poor and cannot adapt to the needs of strenuous exercise. The ankle joint exceeds the range of motion because of the improper posture of the foot when running and jumping. When running and jumping, the foot lands on a puddle, brick or stone, and cannot land with the whole foot flat on the ground. Symptoms of ankle sprain: The sprain occurs suddenly when the foot hits the ground, often with a “banging” sound. Since the ankle joint is more likely to be inwardly retracted and inwardly turned, the lateral ligaments are mostly injured. The ligament swells up a few minutes after the injury. When the anterior talofibular ligament, which is part of the joint capsule, is torn and ruptured, it is often combined with blood accumulation in the joint, and the ankle joint swells up considerably. A few days after the injury, bruising and purple bruises appear and the pain gradually decreases. If the ankle pain is severe and the foot is misaligned forward, backward, or to both sides, it means that there is bleeding in the ankle joint. Ankle sprain treatment: immediately stop exercising, elevate the affected limb appropriately, apply cold compresses within 12 hours to prevent continued bleeding, and apply hot compresses after 12 hours to promote the inflammation to subside. If the sprain is serious, take internal bruising pills and prednisone tablets, and apply camphor wine and turpentine externally. Acupuncture points such as Hanging Bell, Sanyinjiao, Tai Bai and Zhi Yin are also effective. If the pressure pain point injection flumethasone more effective. Two days after the sprain, the patient should be encouraged to move the lower limb early, practice slow walking, and perform massage, acupuncture, physical therapy and other measures to restore the function of the foot early and prevent local adhesions and muscle atrophy. If a fibula fracture is suspected, ask the doctor to confirm the diagnosis with X-ray. In preventing ankle sprains, it is recommended that the following points should be noted: (1) Remove the bricks and stones from the sports field and fill in the potholes before exercise. Prepare the ankle joint for the activity, and then carry out strenuous activities after the ankle joint is fully active. (2) The correct posture should be observed in running, high jumping, skating and ball games, etc. Don’t exert too much force to prevent the foot from turning inside out, but make the whole foot land flat. (3) Pay attention to the exercise of the muscles around the ankle joint to enhance the stability of the ankle joint. For example, practice weight lifting, heel squatting and jumping, running up and down slopes, walking on tiptoe, etc. (4) For patients with repeated ankle sprains, when following up the medical history, it is mostly found that the patient had swelling and ecchymosis in the ankle joint when the first ankle injury occurred. This presentation often represents a tear of the lateral collateral ligament that maintains joint stability. Patients usually do not receive timely formal treatment after the first injury or the treatment is inappropriate, resulting in the lateral collateral ligament not healing, making the ankle less stable and the ankle more prone to sprains. In subsequent multiple sprains, the ankle joint may not be significantly swollen or painful, but it is prone to secondary atrophy of the muscles around the ankle joint, internal ankle impingement, ankle synovitis and ankle cartilage damage, and leads to further loss of ankle stability, forming a vicious cycle that eventually leads to ankle osteoarthritis. Repeated ankle sprains are difficult to diagnose through conventional tests such as X-rays and CT, but physicians can clearly observe ligament damage and cartilage damage through MRI imaging. More importantly, manual examinations, such as ankle drawer test and stress lateral transfer test, can help physicians to correctly understand the extent and location of the injury. Patients with mild recurrent ankle sprains can be treated with self-rehabilitation exercises aimed at increasing joint stability by exercising the strength of the lateral muscles. Patients for whom conservative treatment is ineffective will require surgical treatment.